Recoding a BMW E46 can present unique challenges depending on the vehicle’s production date. Models produced before September 2001 utilize ZCS codes for module programming, while those manufactured after this date employ Vehicle Order (VO) coding. This distinction significantly impacts the recoding process, particularly when using diagnostic software like DIS v43.
For pre-9/01 E46s, modifying the ZCS code and changing the SA code is generally straightforward. For instance, successfully recoding various modules using DIS v43 eliminated unnecessary warning lights on the instrument cluster (kombi). However, full functionality testing awaits pending mechanical component installation.
Post-9/01 E46s, relying on VO coding, pose different hurdles. Attempts to recode the kombi by removing option 205, a common approach, yielded mixed results. While this method extinguished extraneous kombi warnings, it didn’t resolve all issues. Even with the transmission control module disconnected, traction control and brake warning lights persisted, unlike in earlier models where these issues resolved after DSC recoding. Automatic programming attempts via DIS proved ineffective.
A notable difference observed was the passenger side mirror failing to tilt when reversing, despite correctly wiring the reverse lights to the transmission reverse switch and brake relay. This suggests potential coding conflicts within the body control module.
The question arises whether utilizing SSS/Progman, an older BMW diagnostic software, might offer a solution for these newer VO-coded vehicles. SSS/Progman’s compatibility with VO coding could potentially address the complexities encountered with DIS v43 in post-9/01 E46s. While cruise control functionality remains untested in both scenarios, further investigation is needed to determine if recoding impacts this feature. The intricate relationship between VO coding and module programming requires careful consideration when troubleshooting and resolving issues in later E46 models. The experience highlights the need for tailored coding approaches based on the specific production date and coding system of the E46.
